Backdoor.Win32.Delf.lz
(Backdoor.Win32.Delf.lz)

by SIC

Original name unknown

Written in Delphi, compressed with UPX

more in this category


dropped files:
c:\WINDOWS\system32\fsb.stb    Size: 10,240 bytes   (Worm.Win32.Fesber)
c:\WINDOWS\system32\fsb.tmp    Size: 28,672 bytes   (Backdoor.Win32.Delf.lz)

added to registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon "Shell"
old data: Explorer.exe 
new data: Explorer.exe fsb.exe 

Does infect other files.

attempts to connect to an IRC server

tested on Windows XP
September 09, 2004

MegaSecurity